21122210022111 has 24 divisors (see below), whose sum is σ = 34395518008880. Its totient is φ = 12801339405360.

The previous prime is 21122210022107. The next prime is 21122210022113. The reversal of 21122210022111 is 11122001222112.

21122210022111 is a `hidden beast` number, since 211 + 2 + 221 + 0 + 0 + 221 + 11 = 666.

It is not a de Polignac number, because 21122210022111 - 2² = 21122210022107 is a prime.

It is a super-2 number, since 2×21122210022111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122210022113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3232658200 + ... + 3232664733.

Almost surely, 2^{21122210022111} is an apocalyptic number.

21122210022111 is a deficient number, since it is larger than the sum of its proper divisors (13273307986769).

21122210022111 is a wasteful number, since it uses less digits than its factorization.

21122210022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6465322964 (or 6465322947 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21122210022111 its reverse (11122001222112), we get a palindrome (32244211244223).

The spelling of 21122210022111 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten million, twenty-two thousand, one hundred eleven".